/Engine/Source/Editor/ContentBrowser/Public/IContentBrowserSingleton.h
Force refresh on the path picker widget. You may need to do this if you have changed the filter on the path picker.
void RefreshPathView ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > PathPickerWidget )